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// Tags: JDK1.4
// Copyright (C) 2011 Pavel Tisnovsky <ptisnovs@redhat.com>
// This file is part of Mauve.
// Mauve is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// Mauve is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Mauve; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 51 Franklin Street,
// Fifth Floor, Boston, MA 02110-1301 USA.
// Tags: GUI, JDK 1.0
// Uses: ../LocationTests
package gnu.testlet.java.awt.FlowLayout;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import gnu.testlet.java.awt.LocationTests;
import java.awt.Button;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Panel;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.FlowLayout;
/**
* Test if button and canvas are positioned correctly to a frame using FlowLayout.
*/
public class PaintTestRightAlign
extends Panel
implements Testlet
{
/**
* Delay (pause times) for an AWT robot.
*/
public static int DELAY_AMOUNT=250;
/**
* Runs the test using the specified harness.
*
* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
this.setLayout(new FlowLayout(FlowLayout.RIGHT));
setBackground(Color.red);
Frame frame = new Frame();
frame.setSize(300, 300);
// create two components and add them to the panel
Button button = new Button(" ");
Canvas canvas = new Canvas();
canvas.setSize(100,100);
button.setBackground(Color.blue);
canvas.setBackground(Color.yellow);
add(button);
add(canvas);
frame.add(this);
frame.show();
// AWT robot is used for reading pixel colors
// from a screen and also to wait for all
// widgets to stabilize theirs size and position.
Robot robot = harness.createRobot();
// we should wait a moment before the computations
// and pixel checks
robot.waitForIdle();
robot.delay(DELAY_AMOUNT);
// check if the first component is properly shown on the panel
harness.checkPoint("first component");
harness.check(getColorForComponent(robot, frame, button), Color.blue);
// check if the second component is properly shown on the panel
harness.checkPoint("second component");
harness.check(getColorForComponent(robot, frame, canvas), Color.yellow);
// There is a delay to avoid any race conditions
// and so user can see frame
robot.waitForIdle();
robot.delay(DELAY_AMOUNT);
// it's necesarry to clean up the component from desktop
frame.dispose();
}
/**
* Get color of a pixel located in the middle of the component.
*
* @param robot instance of AWT robot
* @param frame frame where component is used
* @param component tested component
*/
private Color getColorForComponent(Robot robot, Frame frame, Component component)
{
// compute the absolute coordinates of a component inside the frame
Rectangle bounds = computeBounds(frame, component);
// position of checked pixel
int checkedPixelX = bounds.x + bounds.width / 2;
int checkedPixelY = bounds.y + bounds.height / 2;
// move mouse cursor to center of a rectangle
moveCursorToGivenPosition(robot, checkedPixelX, checkedPixelY);
// check the color of a pixel located in the button center
return robot.getPixelColor(checkedPixelX, checkedPixelY);
}
/**
* Compute absolute coordinates of a component inside the frame
*
* @param frame frame where component is used
* @param component tested component
*
* @return coordinates of a component inside the frame
*/
private Rectangle computeBounds(Frame frame, Component component)
{
Rectangle bounds = component.getBounds();
Point location = frame.getLocationOnScreen();
Insets insets = frame.getInsets();
bounds.x += insets.left + location.x;
bounds.y += insets.top + location.y;
// return computed bounds
return bounds;
}
/**
* Move mouse cursor to center of a rectangle
*
* @param robot instance of AWT robot
* @param checkedPixelX x-coordinate of pixel on a screen
* @param checkedPixelY y-coordinate of pixel on a screen
*/
private void moveCursorToGivenPosition(Robot robot, int checkedPixelX, int checkedPixelY)
{
// move the mouse cursor to a tested pixel to show users what's checked
robot.delay(DELAY_AMOUNT);
robot.mouseMove(checkedPixelX, checkedPixelY);
robot.delay(DELAY_AMOUNT);
robot.waitForIdle();
}
/**
* Paint method for a panel where components are tested.
*
* @param g the graphics context to use for painting
*/
public void paint(Graphics g)
{
Image offScr = createImage(getSize().width, getSize().height);
Graphics offG = offScr.getGraphics();
offG.setClip(0, 0, getSize().width, getSize().height);
super.paint(offG);
g.drawImage(offScr, 0, 0, null);
offG.dispose();
}
}
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